1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
|
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=us-ascii" />
<meta http-equiv="Content-Style-Type" content="text/css" />
<meta http-equiv="Content-Script-Type" content="text/javascript" />
<title>ID mapping</title>
<meta name="generator" content="Oracle DARB XHTML Converter (Mode = ohj/ohw) - Version 5.1.1" />
<meta name="date" content="2010-05-19T8:12:44Z" />
<meta name="robots" content="noarchive" />
<meta name="doctitle" content="ID mapping" />
<meta name="relnum" content="Release 2.3" />
<meta name="copyright" content="Copyright (c) 2000, 2008 oracle . All rights reserved. This program and the accompanying materials are made available under the terms of the Eclipse Public License v1.0 which accompanies this distribution, and is available at http://www.eclipse.org/legal/epl-v10.html. Contributors: Oracle - initial API and implementation" />
<link rel="copyright" href="dcommon/html/cpyr.htm" title="Copyright" type="text/html" />
<link rel="stylesheet" href="dcommon/css/blafdoc.css" title="Oracle BLAFDoc" type="text/css" />
<!-- contents -->
</head>
<body>
<p><a id="BABGCBHG" name="BABGCBHG"></a></p>
<div class="sect2"><!-- infolevel="all" infotype="General" -->
<h1>ID mapping</h1>
<p><a id="sthref126" name="sthref126"></a><a id="sthref127" name="sthref127"></a><a id="sthref128" name="sthref128"></a><a id="sthref129" name="sthref129"></a>Use an <span class="bold">ID Mapping</span> to specify the primary key of an entity. ID mappings may be used with a <a href="tasks006.htm#BABGBIEE">Entity</a> or <a href="tasks008.htm#BABDAGCI">Mapped superclass</a>. Each <a href="tasks006.htm#BABGBIEE">Entity</a> must have an ID mapping.</p>
<ol>
<li>
<p>In the <a href="ref_persistence_outline.htm#BABEGGFE">JPA Structure view</a>, select the field to map.</p>
</li>
<li>
<p>Right click the filed and then select <span class="bold">Map as > ID</span>. The <a href="ref_persistence_map_view.htm#BABIFBAF">JPA Details view (for attributes)</a> displays the properties for the selected.</p>
</li>
<li>
<p>Use this table to complete the <a href="ref_mapping_general.htm#CACBHFIJ">General information</a> fields in the <span class="gui-object-title">JPA Details</span> view.</p>
<div class="inftblruleinformal">
<table class="RuleInformal" title="This table lists the fields in the Persistence Properties view for this mapping." summary="This table lists the fields in the Persistence Properties view for this mapping." dir="ltr" border="1" width="100%" frame="border" rules="all" cellpadding="3" cellspacing="0">
<col width="22%" />
<col width="*" />
<col width="35%" />
<thead>
<tr align="left" valign="top">
<th align="left" valign="bottom" id="r1c1-t17">Property</th>
<th align="left" valign="bottom" id="r1c2-t17">Description</th>
<th align="left" valign="bottom" id="r1c3-t17">Default</th>
</tr>
</thead>
<tbody>
<tr align="left" valign="top">
<td align="left" id="r2c1-t17" headers="r1c1-t17">Entity Mapping Hyperlink</td>
<td align="left" headers="r2c1-t17 r1c2-t17">Defines this mapping as an <span class="bold">ID Mapping</span>.
<p>This field corresponds to the <code>@Id</code> annotation.</p>
</td>
<td align="left" headers="r2c1-t17 r1c3-t17">ID</td>
</tr>
<tr align="left" valign="top">
<td align="left" id="r3c1-t17" headers="r1c1-t17">Column</td>
<td align="left" headers="r3c1-t17 r1c2-t17">The database column mapped to the entity attribute. See <a href="ref_mapping_general.htm#CACGCBHB">"Column"</a> for details.</td>
<td align="left" headers="r3c1-t17 r1c3-t17">By default, the Column is assumed to be named identically to the attribute.</td>
</tr>
<tr align="left" valign="top">
<td align="left" id="r4c1-t17" headers="r1c1-t17">Table</td>
<td align="left" headers="r4c1-t17 r1c2-t17">The database table mapped to the entity attribute.</td>
<td align="left" headers="r4c1-t17 r1c3-t17">By default, the Table is assumed to be identical to the table associated with the entity.</td>
</tr>
<tr align="left" valign="top">
<td align="left" id="r5c1-t17" headers="r1c1-t17">Temporal</td>
<td align="left" headers="r5c1-t17 r1c2-t17">Specifies the type of data. See <a href="ref_mapping_general.htm#CACEAJGD">"Temporal"</a> for details.
<ul>
<li>
<p>Date</p>
</li>
<li>
<p>Time</p>
</li>
<li>
<p>Timestamp</p>
</li>
</ul>
</td>
<td align="left" headers="r5c1-t17 r1c3-t17"><br /></td>
</tr>
</tbody>
</table>
<br /></div>
<!-- class="inftblruleinformal" --></li>
<li>
<p>Use this table to complete the fields in <a href="ref_primary_key.htm#CACFCCAB">Primary Key Generation information</a> area in the <span class="gui-object-title">JPA Details</span> view.</p>
<div class="inftblruleinformal">
<table class="RuleInformal" title="This table lists the fields in the PK Generation tab." summary="This table lists the fields in the PK Generation tab." dir="ltr" border="1" width="100%" frame="border" rules="all" cellpadding="3" cellspacing="0">
<col width="22%" />
<col width="*" />
<col width="35%" />
<thead>
<tr align="left" valign="top">
<th align="left" valign="bottom" id="r1c1-t18">Property</th>
<th align="left" valign="bottom" id="r1c2-t18">Description</th>
<th align="left" valign="bottom" id="r1c3-t18">Default</th>
</tr>
</thead>
<tbody>
<tr align="left" valign="top">
<td align="left" id="r2c1-t18" headers="r1c1-t18">Primary Key Generation</td>
<td align="left" headers="r2c1-t18 r1c2-t18">These fields define how the primary key is generated.</td>
<td align="left" headers="r2c1-t18 r1c3-t18"><br /></td>
</tr>
<tr align="left" valign="top">
<td align="left" id="r3c1-t18" headers="r1c1-t18"> Strategy</td>
<td align="left" headers="r3c1-t18 r1c2-t18">See <a href="ref_primary_key.htm#CACBAJBC">"Primary Key Generation"</a> for details.
<ul>
<li>
<p>Auto</p>
</li>
<li>
<p>Sequence</p>
</li>
<li>
<p>Identity</p>
</li>
<li>
<p>Table</p>
</li>
</ul>
</td>
<td align="left" headers="r3c1-t18 r1c3-t18">Auto</td>
</tr>
<tr align="left" valign="top">
<td align="left" id="r4c1-t18" headers="r1c1-t18"> Generator Name</td>
<td align="left" headers="r4c1-t18 r1c2-t18">Name of the primary key generator specified in the <span class="bold">Strategy</span></td>
<td align="left" headers="r4c1-t18 r1c3-t18"><br /></td>
</tr>
</tbody>
</table>
<br /></div>
<!-- class="inftblruleinformal" --></li>
</ol>
<p>Additional fields will appear in the <a href="ref_primary_key.htm#CACFCCAB">Primary Key Generation information</a> area, depending on the selected Strategy. See <a href="ref_persistence_map_view.htm#BABIFBAF">"JPA Details view (for attributes)"</a> for additional information.</p>
<p>Eclipse adds the following annotations to the field:</p>
<pre xml:space="preserve" class="oac_no_warn">
@Id
@Column(name="<span class="italic"><COLUMN_NAME></span>", table="<span class="italic"><TABLE_NAME></span>", insertable=<span class="italic"><INSERTABLE></span>,
updatable=<span class="italic"><UPDATABLE></span>)
@Temporal(<span class="italic"><TEMPORAL></span>)
@GeneratedValue(strategy=GeneratorType.<span class="italic"><STRATEGY></span>, generator="<span class="italic"><GENERATOR_NAME></span>")@TableGenerator(name="<span class="italic"><TABLE_GENERATOR_NAME></span>", table = "<span class="italic"><TABLE_GENERATOR_TABLE></span>",
pkColumnName = "<span class="italic"><TABLE_GENERATOR_PK></span>",
valueColumnName = "<span class="italic"><TABLE_GENERATOR_VALUE_COLUMN></span>",
pkColumnValue = "<span class="italic"><TABLE_GENERATOR_PK_COLUMN_VALUE></span>")@SequenceGenerator(name="<span class="italic"><SEQUENCE_GENERATOR_NAME></span>",
sequenceName="<span class="italic"><SEQUENCE_GENERATOR_SEQUENCE></span>")
</pre>
<p> </p>
<img src="img/ngrelt.png" alt="Related task" title="Related task" /><br />
<br />
<a href="task_mapping.htm#BABDGBIJ">Mapping an entity</a>
<p> </p>
<img src="img/ngrelr.png" alt="Related reference" title="Related reference" /><br />
<br />
<a href="ref_persistence_outline.htm#BABEGGFE">JPA Structure view</a><br />
<a href="ref_persistence_map_view.htm#BABIFBAF">JPA Details view (for attributes)</a>
<p> </p>
<img src="img/ngrelc.png" alt="Related concept" title="Related concept" /><br />
<br />
<a href="concept_mapping.htm#BABBDJFI">Understanding OR mappings</a><br />
<a href="concepts001.htm#BABBGFJG">Understanding EJB 3.0 Java Persistence API</a></div>
<!-- class="sect2" -->
<!-- Start Footer -->
<div class="footer">
<table class="simple oac_no_warn" summary="" cellspacing="0" cellpadding="0" width="100%">
<col width="86%" />
<col width="*" />
<tr>
<td align="left"><span class="copyrightlogo">Copyright © 2006, 2010, Oracle and/or its affiliates. All rights reserved.</span><br />
<a href="dcommon/html/cpyr.htm"><span class="copyrightlogo">Legal Notices</span></a></td>
</tr>
</table>
</div>
<!-- class="footer" -->
</body>
</html>
|
